公开(公告)号：US06502429B1

公开(公告)日：2003-01-07

申请号：US09937774

申请日：2001-10-01

Applicant: Yuji Abe

Inventor： Yuji Abe

IPC: C03B3707

CPC classification number: C03B37/0253 ,  C03B2203/36 ,  C03B2205/40 ,  C03B2205/44 ,  C03B2205/72 ,  G02B6/02004 ,  G02B6/02252

Abstract: The present invention relates to an optical fiber fabrication method by which an optical fiber having an objective chromatic dispersion characteristic can be obtained readily. In an optical fiber fabrication method, a cutoff wavelength is measured in an optical fiber with a fixed length obtained by first drawing a part of an optical fiber preform. A target glass diameter for yielding an objective chromatic dispersion characteristic is then determined based on the cutoff wavelength thus measured. Then the rest of the optical fiber preform is drawn so that the glass diameter becomes the target glass diameter thus determined, thereby fabricating the optical fiber.

Abstract translation: 光纤制造方法技术领域本发明涉及容易获得具有目标色散特性的光纤的光纤制造方法。 在光纤制造方法中，在通过首先拉制一部分光纤预制棒而获得的具有固定长度的光纤中测量截止波长。 然后基于所测量的截止波长来确定用于产生目标色散特性的目标玻璃直径。 然后拉出光纤预制棒的其余部分，使得玻璃直径成为由此确定的目标玻璃直径，由此制造光纤。

公开(公告)号：US06502428B1

公开(公告)日：2003-01-07

申请号：US09698280

申请日：2000-10-30

Applicant: Masashi Onishi ,  Kazuya Kuwahara ,  Katsuya Nagayama

Inventor： Masashi Onishi ,  Kazuya Kuwahara ,  Katsuya Nagayama

IPC: C03B3707

CPC classification number: G02B6/03666 ,  C03B37/0253 ,  C03B2203/18 ,  C03B2203/36 ,  C03B2205/40 ,  C03B2205/72 ,  G02B6/02271 ,  G02B6/0283 ,  G02B6/03627

Abstract: A manufacturing method of an optical fiber, which enables to precisely manufacture the optical fiber having a desired chromatic dispersion, comprising: (1) preparing an optical fiber preform having a longitudinally uniform refractive index, (2) measuring the chromatic dispersion of a predetermined length of the optical fiber obtained at the beginning of the drawing, (3) according to the results of such measurement, estimating the chromatic dispersion characteristic of the optical fiber obtained by drawing the optical fiber preform, and commencing the drawing of the optical fiber preform. To achieve the target chromatic dispersion diameter of the optical fiber is determined according to the chromatic dispersion that is measured with respect to a predetermined length of an optical fiber obtained at the beginning of the drawing of an optical fiber preform. Then, the remainder of the optical fiber preform is drawn to produce an optical fiber having the desired chromatic dispersion.

Abstract translation: 一种光纤制造方法，其能够精确地制造具有期望的色散的光纤，包括：（1）制备具有纵向均匀折射率的光纤预制棒，（2）测量预定长度的色散 ，（3）根据这种测量结果，估计通过拉制光纤预制棒而获得的光纤的色散特性，并开始拉伸光纤预制棒。 根据在光纤预制件的绘制开始时获得的光纤的预定长度测量的色散来确定实现光纤的目标色散直径。 然后，拉出光纤预制件的其余部分，以产生具有所需色散的光纤。

公开(公告)号：US06427044B1

公开(公告)日：2002-07-30

申请号：US09585337

申请日：2000-06-02

Applicant: Eiji Yanada ,  Yuichi Ohga ,  Masashi Onishi

Inventor： Eiji Yanada ,  Yuichi Ohga ,  Masashi Onishi

IPC: G02B622

CPC classification number: G02B6/03666 ,  C03B37/027 ,  C03B37/02745 ,  C03B37/032 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/36 ,  C03B2205/06 ,  C03B2205/40 ,  C03C25/1062 ,  G02B6/02014 ,  G02B6/02257 ,  G02B6/02271 ,  G02B6/02395 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03644

Abstract: The present invention relates to an optical fiber comprising a structure which yields a low optical transmission loss even when doped with a high concentration of Ge element and is excellent in reliability for strength. The optical fiber according to the present invention comprises a core region whose maximum value &Dgr;max of relative refractive index difference with respect to silica glass non-intentionally doped with impurities is 0.8% or more, in its diameter direction, a cladding region comprising silica glass non-intentionally doped with impurities or silica glass doped with a predetermined amount of fluorine, and a hermetic coat mainly composed of carbon. In particular, the transmission loss &agr; at a wavelength of 1.55 &mgr;m and the maximum value &Dgr;max satisfy the relationship of: &agr;≦0.131×(&Dgr;max)2−0.214×(&Dgr;max)+0.284 in the optical fiber according to the present invention.

Abstract translation: 本发明涉及一种光纤，其包括即使掺杂高浓度的Ge元素也能够获得低的光传输损失，并且强度可靠性优异的结构。 根据本发明的光纤包括芯区，其相对折射率差的相对折射率差的最大值相对于未有意掺杂杂质的石英玻璃的直径方向为0.8％以上，包含二氧化硅玻璃非晶的包层区域 - 掺杂有预定量氟的杂质或二氧化硅玻璃以及主要由碳组成的气密涂层。 特别地，在1.55μm波长的传输损耗α和最大值DELTAmax满足根据本发明的光纤中的关系：

公开(公告)号：US06250112B1

公开(公告)日：2001-06-26

申请号：US09325298

申请日：1999-06-03

Applicant: Alain Kerdoncuff

Inventor： Alain Kerdoncuff

IPC: C03B3707

CPC classification number: C03B37/023 ,  C03B37/07 ,  C03B2205/10 ,  C03B2205/40 ,  C03B2205/44

Abstract: A double crucible fiber fabrication system employing a rod to control flow of the core material to produce a core of desired diameter. The rod fits closely within the inner crucible and moves at a speed necessary to produce a core material flow rate which will produce a desired core diameter. Control of the rod speed produces good control of core diameter for a wide variety of different core materials. It is also possible to control the rod speed in order to compensate for capillary effects and leakage of core material. Furthermore, control of the rod speed allows fabrication of a fiber having a core diameter which varies as desired throughout a single fiber.

Abstract translation: 一种双坩埚纤维制造系统，其使用杆来控制芯材料的流动以产生所需直径的芯。 杆紧密地配合在内坩埚内并且以产生芯材流动速度所必需的速度移动，这将产生期望的芯直径。 对于各种不同的芯材料，棒速度的控制可以很好地控制纤芯直径。 也可以控制杆速度，以补偿毛细管效应和芯材料泄漏。 此外，杆速度的控制允许制造具有根据需要在整个单根纤维中变化的纤芯直径的纤维。

公开(公告)号：US6002472A

公开(公告)日：1999-12-14

申请号：US38985

申请日：1998-03-12

Applicant: Yusuhiro Naka ,  Shimpei Todo

Inventor： Yusuhiro Naka ,  Shimpei Todo

IPC: C03B37/025 ,  G01L5/04 ,  G01N21/00

CPC classification number: C03B37/0253 ,  G01L5/042 ,  C03B2205/40

Abstract: A method of measuring the tension of drawing an optical fiber by means of the oscillation waveform of the optical fiber being drawn according to the invention can accurately, reliably and easily detect a peak frequency in the frequency spectrum of an oscillation waveform without being affected by noise. With the method of measuring the tension of an optical fiber being drawn by determining the fundamental oscillation frequency of the optical fiber from a peak in the spectrum of the linear oscillation waveform of the optical fiber, the detection of a peak frequency in the frequency spectrum of a linear oscillation waveform comprises steps of conducting an initial detecting operation over a frequency range expected to contain a peak frequency and conducting subsequent detecting operations over respective frequency ranges obtained by sequentially aligning the median frequency with the peak frequency detected in the immediately preceding detecting operation.

Abstract translation: 通过根据本发明的被抽出的光纤的振荡波形测量拉伸光纤的张力的方法可以精确，可靠且容易地检测振荡波形的频谱中的峰值频率而不受噪声的影响 。 利用通过从光纤的线性振荡波形的频谱中的峰值确定光纤的基本振荡频率来测量被拉伸的光纤的张力的方法，检测频谱的频谱中的峰值频率 线性振荡波形包括以下步骤：在预期包含峰值频率的频率范围内进行初始检测操作，并在通过将中值频率顺序地对准在前一检测操作中检测到​​的峰值频率获得的各个频率范围上进行后续检测操作。

公开(公告)号：US5879425A

公开(公告)日：1999-03-09

申请号：US182249

申请日：1971-09-20

Applicant: Floyd J. Jensen

Inventor： Floyd J. Jensen

IPC: C03B37/012 ,  C03B37/025 ,  C03B37/028 ,  C03B37/16 ,  C03B37/022

CPC classification number: C03B37/01248 ,  C03B23/047 ,  C03B37/01214 ,  C03B37/0253 ,  C03B37/028 ,  C03B37/16 ,  C03B2203/04 ,  C03B2205/08 ,  C03B2205/40

Abstract: A rod of etchable core glass material is inserted within a lead glass sleeve and heated in a furnace to drawing temperature and drawn from the furnace into a fiber. The lower end of the glass sleeve is collapsed around the core glass, thereby sealing the sleeve to the core rod. A vacuum is drawn on the space between the rod and the sleeve while in the furnace for outgassing the rod and sleeve and for eliminating gas tending to be trapped between the core fiber and its sleeve. In a subsequent step, a multitude of such glass fibers are assembled in a bundle, inserted within an evacuable glass sleeve, and heated to the softening point while drawing a vacuum on the bundle of fibers and the interior of the sleeve for further outgassing of the fibers. While the assembly is in the furnace, the exterior of the sleeve is pressurized to fuse the assembly of glass fibers together and to the sleeve to form a final boule which is subsequently transversely sliced to form plates which are etched to remove the core glass.

Abstract translation: 将可蚀刻的芯玻璃材料棒插入铅玻璃套筒内并在炉中加热到拉伸温度并从炉中拉出成纤维。 玻璃套筒的下端围绕芯玻璃折叠，从而将套筒密封到芯棒上。 在炉子中的杆和套筒之间的空间上抽真空，用于使杆和套筒脱气，并且用于消除倾向于被捕获在芯纤维和其套筒之间的气体。 在随后的步骤中，将许多这样的玻璃纤维组装成束，插入可抽出的玻璃套筒内，并加热到软化点，同时在纤维束和套筒的内部抽真空以进一步除气 纤维。 当组件在炉中时，套筒的外部被加压以将玻璃纤维的组件融合在一起并且与套筒形成最后的坯料，随后将其横向切片以形成被蚀刻以除去芯玻璃的板。

公开(公告)号：US5681365A

公开(公告)日：1997-10-28

申请号：US412489

申请日：1995-03-28

Applicant: John W. Gilliland ,  Alan J. Morrow ,  Kenneth Sandhage

Inventor： John W. Gilliland ,  Alan J. Morrow ,  Kenneth Sandhage

IPC: C03B37/014 ,  C03B37/027 ,  C03C13/04 ,  G02B6/02

CPC classification number: C03C13/045 ,  C03B37/01446 ,  C03B37/027 ,  G02B6/02 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2205/40 ,  Y02P40/57

Abstract: A radiation resistant optical waveguide fiber doped with fluorine or drawn with low tension in the fiber. The fluorine doping is substantially constant across the core and a portion of the clad adjacent the core. The concentration of the fluorine is in the range of about 0.3 to 3.0 weight percent. The draw tension is less than or equal to about 5 grams (40 dynes/cm.sup.2) to achieve optimum radiation resistance. A synergy is found when fluorine and low draw tension are applied to a fiber. Improvement in radiation resistance is largely independent of fiber type and geometry. Further improvement in radiation resistance is found when germanium is doped in a portion of the clad adjacent the core.

Abstract translation: 掺杂氟的耐辐射光波导纤维或纤维中低拉伸拉伸。 核掺杂的氟掺杂基本上是恒定的，并且一部分包层与核相邻。 氟的浓度在约0.3至3.0重量％的范围内。 拉伸张力小于或等于约5克（40达因/厘米2），以达到最佳的耐辐射性。 当氟和低拉伸张力施加到纤维时，发现协同作用。 辐射阻抗的改善在很大程度上与纤维类型和几何形状无关。 当在邻近芯的包层的一部分中掺杂锗时，发现辐射电阻的进一步改善。

公开(公告)号：US5509101A

公开(公告)日：1996-04-16

申请号：US272803

申请日：1994-07-11

Applicant: John W. Gilliland ,  Alan J. Morrow ,  Kenneth Sandhage

Inventor： John W. Gilliland ,  Alan J. Morrow ,  Kenneth Sandhage

IPC: C03B37/014 ,  C03B37/027 ,  C03C13/04 ,  G02B6/02 ,  G02B6/00 ,  C03B37/023

CPC classification number: C03C13/045 ,  C03B37/01446 ,  C03B37/027 ,  G02B6/02 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2205/40 ,  Y02P40/57

Abstract: A radiation resistant optical waveguide fiber doped with fluorine or drawn with low tension in the fiber. The fluorine doping is substantially constant across the core and a portion of the clad adjacent the core. The concentration of the fluorine is in the range of about 0.3 to 3.0 weight percent. The draw tension is less than or equal to about 5 grams (40 dynes/cm.sup.2) to achieve optimum radiation resistance. A synergy is found when fluorine and low draw tension are applied to a fiber. Improvement in radiation resistance is largely independent of fiber type and geometry.Further improvement in radiation resistance is found when germanium is doped in a portion of the clad adjacent the core.

Abstract translation: 掺杂氟的耐辐射光波导纤维或纤维中低拉伸拉伸。 核掺杂的氟掺杂基本上是恒定的，并且一部分包层与核相邻。 氟的浓度在约0.3至3.0重量％的范围内。 拉伸张力小于或等于约5克（40达因/厘米2），以达到最佳的耐辐射性。 当氟和低拉伸张力施加到纤维时，发现协同作用。 辐射阻抗的改善在很大程度上与纤维类型和几何形状无关。 当在邻近芯的包层的一部分中掺杂锗时，发现辐射电阻的进一步改善。

公开(公告)号：US5314517A

公开(公告)日：1994-05-24

申请号：US999081

申请日：1992-12-31

Applicant: David M. Koening ,  Peter J. Majestic ,  Richard O. Maschmeyer

Inventor： David M. Koening ,  Peter J. Majestic ,  Richard O. Maschmeyer

IPC: C03B20/00 ,  C03B37/012 ,  C03B37/025 ,  C03B37/07 ,  G02B6/00 ,  G05B11/42 ,  C03B23/047

CPC classification number: C03B37/01242 ,  C03B37/0253 ,  G05B11/42 ,  C03B2205/40 ,  Y10S65/13

Abstract: A method for drawing glass objects from glass feedstock, wherein a dimension of the glass object is measured on-line and controlled by a control structure which compensates for the deadtime between a change to the drawing speed and the measurement of the effect of that change to the measured dimension. The model which compensates for the deadtime is preferably nonlinear, and the control gains and model parameters are preferably continuously calculated during the drawing process. The invention is particularly applicable to drawing optical waveguide cane from optical waveguide preforms.

Abstract translation: 一种用于从玻璃原料中拉制玻璃物体的方法，其中玻璃物体的尺寸在线测量并由控制结构控制，该控制结构补偿了拉拔速度的变化与该变化的影响的测量之间的停留时间 测量尺寸。 补偿死区时间的模型优选是非线性的，并且控制增益和模型参数优选在绘制过程期间连续计算。 本发明特别适用于从光波导预成型件绘制光波导管。

公开(公告)号：US5079433A

公开(公告)日：1992-01-07

申请号：US593204

申请日：1990-10-05

Applicant: Gregory E. Smith

Inventor： Gregory E. Smith

IPC: G01L1/00 ,  C03B37/025 ,  G01L5/04 ,  G01L5/10 ,  G01M11/00 ,  G02B6/00

CPC classification number: G01M11/37 ,  C03B37/0253 ,  G01L5/042 ,  C03B2205/40 ,  C03B2205/72

Abstract: A new-contact method for monitoring the tension in an optical waveguide fiber during drawing is provided. The motion of the fiber is sensed in a direction transverse to the direction in which the fiber is moving. The sensed motion is analyzed to determine a plurality of frequency components thereof, each frequency component having a magnitude, and one of the components constituting the maximum magnitude component. The frequency of the maximum magnitude component is doubled to obtain a doubled frequency. The presence of a frequency component near the doubled frequency is ascertained to verify that the maximum magntiude component is the principle harmonic frequency of motion of the fiber. The tension in the fiber is then determined from the verified principal harmonic frequency component.

Abstract translation: 提供了一种用于在拉制期间监测光纤中的张力的新接触方法。 光纤的运动在与纤维移动方向相反的方向上被感测。 分析所感测的运动以确定其多个频率分量，每个频率分量具有幅度，并且构成最大幅度分量的分量之一。 最大幅度分量的频率加倍以获得倍频。 确定在双倍频率附近存在频率分量以验证最大磁性分量是光纤运动的主要谐波频率。 然后从验证的主谐波频率分量确定光纤中的张力。